How much was lost in the Swapnex hack?

The Swapnex hack resulted in $61K in losses on May 12, 2022.

What attack technique was used in the Swapnex exploit?

The Swapnex exploit utilized Rugpull. Understanding this attack vector is critical for smart contract auditors and developers building secure DeFi protocols.

How can developers prevent similar smart contract attacks?

Preventing smart contract hacks requires a combination of secure coding practices, thorough security audits, and understanding common attack vectors like reentrancy, oracle manipulation, and access control flaws. Smart Contract Hacking (SCH) provides hands-on training to help developers and auditors identify and prevent vulnerabilities before deployment.

Swapnex Hack

TOTAL LOST $61K

Low May 12, 2022 Rugpull

Affected Chain 2022 Incident surface

Recovered - No recovery reported

All-Time Rank #1674 By amount stolen

Protocol Type Exit Scam/Rugpull Target category

Incident Overview

Swapnex.io deceived their users in the amount of more than $60K USD. Swapnex is a rugpull that attracted investors' money and on May 11, 2022, simply disappeared with users' money.

Swapnex main wallet: 0xeCceFaB8…62AC5D

Binance Hot Wallet: 0xa180Fe01…20d947

Incident Report

Protocol / Project Swapnex

Date of Incident May 12, 2022

Attack Technique Rugpull

Classification Exchange (DEX)

Primary Source View Post-Mortem

Protocol Information

Protocol Type Exit Scam/Rugpull

Official Website swapx.fi/

Protocol Twitter/X @https://mobile.twitter.com/swapnex/with_replies

Team Anonymous

Source Code Unverified

Market Context at Time of Hack

Token Categories

DeFi DEX Sonic Ecosystem

Protocol Links

What the Attacker Needed to Succeed

Understanding the prerequisites for this type of attack helps auditors identify protocols that are most at risk and helps developers build better defenses.

Technical Knowledge Deep understanding of rugpull and Solidity and EVM internals

Capital Required Seed capital to cover gas and initial position setup

On-Chain Access Ability to interact with smart contracts and deploy a custom exploit contract

Protocol Analysis Identification of the exploitable vulnerability in Swapnex's contract logic - root cause: exchange (dex)

Execution Speed Precise transaction ordering and timing to exploit the vulnerability within a single atomic block

Obfuscation Plan A strategy to launder and move stolen funds - typically through mixers, cross-chain bridges, or decentralized DEX swaps to resist tracing

What Auditors Should Check

Could this have been caught in audit? Hard to catch — private key / OpSec failures are outside smart contract audit scope

If you're auditing a protocol with similar architecture to Swapnex, these are the critical security checks that could have prevented this incident (May 2022).

Verify all logic paths related to Rugpull are guarded by proper access controls and input validation
Review privileged functions (owner, admin, governance) for potential abuse vectors - centralization risks should be documented and bounded with timelocks or multi-sigs

Master these auditing techniques with hands-on labs and real exploit scenarios in the Smart Contract Hacking course.

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Sources & References

01
Source 1 https://mobile.twitter.com/swapnex/with_replies
02
Web Archive https://twitter.com/RugDocIO/status/1527332078160732196

Threat Assessment

Severity Level

LOW

Attack Vector Rugpull
Root Cause Exchange (DEX)
Year 2022

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